Category Archives: PCB Troubleshooting

Discussing relay and/or control board problems powering the blower motor on electric air handlers and gas furnaces. A quick easy way to trouble shoot most fan control boards to determine if the blower motor is working or if it is the control board. IF YOU FIND THIS VIDEO USEFUL * please* feel free to make […]

FULL VIDEO HERE: https://www.youtube.com/watch?v=VOM8CfRUkIY With ABI’s SYSTEM 8 Range of IC and PCB testers, you will be able to fault find / troubleshoot and repair any type of analogue or digital device or PCB. The tests can be carried out at component level as well as at PCB level. The SYSTEM 8 /BoardMaster Range includes […]

A look at an old AVR (Automatic Voltage Regulator) PCB that I was asked if I could fix. these devices are used in generators to regulate the output voltage, which they do by varying the DC excitation of the rotating (rotor) central core of a generator. A generator works by spinning a polarised magnetic field […]

Built on proven technology and powered by the renowned TestVue software, the PinPoint family of powerful diagnostic test systems allow you to prove your circuits are working or diagnose the exact cause of a failure when they don’t. source

Repair tip to keep your Washing machine control board working. Easy technique utilizing NTE relay sub. The format of this repair demo is also handy for working on other type boards. D-lab electronics is offering more teaching / how to videos on Curious.com. source

I discuss the low voltage transformer used in HVAC units. Voltage checks are shown to troubleshoot low voltage problems. This video is part of the heating and cooling series of training videos made to accompany my websites: www.graycoolingman.com and www.grayfurnaceman.com to pass on what I have learned in many years of service and repair. If […]